129966829 has 8 divisors (see below), whose sum is σ = 133648128. Its totient is φ = 126294480.

The previous prime is 129966817. The next prime is 129966839. The reversal of 129966829 is 928669921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129966829 - 2¹¹ = 129964781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129966839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36444 + ... + 39850.

It is an arithmetic number, because the mean of its divisors is an integer number (16706016).

Almost surely, 2^129966829 is an apocalyptic number.

It is an amenable number.

129966829 is a deficient number, since it is larger than the sum of its proper divisors (3681299).

129966829 is a wasteful number, since it uses less digits than its factorization.

129966829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475.

The product of its digits is 839808, while the sum is 52.

The square root of 129966829 is about 11400.2995136093. The cubic root of 129966829 is about 506.5366116929.

The spelling of 129966829 in words is "one hundred twenty-nine million, nine hundred sixty-six thousand, eight hundred twenty-nine".